Isikhokelo soKhetho lwe-F-Theta kunye neempawu zabo

Iimpawu

I-f-theta egxile kwisipili sendawo, enyanisweni, luhlobo lwesibuko sentsimi, siyilelwe ukwenza ubude bomfanekiso kunye ne-engile yokuskena ukwanelisa ubudlelwane y=f*θ θ iqela lelensi (θ yi-engile yokuphambuka kwegalvanometer) , ngoko isipili se-f-theta saziwa njengelensi yomgca.Ineempawu ezininzi:

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(2) Isantya esithile sokuphambuka kwesibane sesehlo sihambelana nesantya sokuskena esingaguqukiyo, ngoko ke ukuskena kumgca okuqikelelwayo kunokuphunyezwa ngokukhanya okusehlo kwesantya esilinganayo se-angular.

Ulwazi lwe-F-Theta eJolise ukuKhethwa kweSipili seNdawo

Iiparamitha eziphambili zobugcisa bezibuko zentsimi ziquka ubude be-wavelength, uluhlu lokuskena (okanye ubude obugxilwe), kunye nedayamitha yendawo egxininisiweyo.

1) Ubude beWaveleng bokusebenza:Ubude obusebenzayo be-lens yentsimi bunqunywe yi-laser yomatshini wokumakisha.Ubude be-laser ye-fiber yi-1064 nm, ubude be-laser ye-CO2 yi-10.6 um, i-wavelength ye-laser eluhlaza yi-532 nm, ubude be-laser ye-UV yi-355 nm, kunye ne-lens yentsimi ehambelana nayo ikhethiweyo. laser.

2) Indawo yokuskena:Indawo ekugxilwe kuyo yesipili sendawo yokuskena imiselwa bubude obugxininise kwisipili sendawo ekugxilwe kuyo, ubude bojoliso lwesibuko sentsimi ngokuqhelekileyo uphawulwe kuphela kubude obugxininisiweyo, ubude obugxininisiweyo kunye nommandla wokuskena unefomula yobungqina: indawo f = 0.7 × ubude bojoliso. .

Umzekelo, f = 160 mm isibuko sentsimi sihambelana ne-square ye-112 mm, ukulungiswa ngokubanzi kobubanzi benani elipheleleyo ngu-110 mm × 110 mm, f = 100 mm isibuko sentsimi sihambelana nobubanzi be-70 mm × 70 mm.

3)Umfundi wesiganeko:Isiganeko somfundi wesibuko sentsimi kufuneka silingane ngokulingana nobubanzi be-laser beam evela kwi-galvanometer.Kodwa sibazi njani ubungakanani bobubanzi be-laser beam evela kwi-galvanometer?Thatha awona manani amancinci amabini: enye = indawo ephumayo yelaser * i-multiplier yokwandisa umqadi;enye ilingana nenani lendawo yegalvanometer.

Kwenzeka ntoni ukuba i-diameter ye-laser beam evela kwi-galvanometer inkulu kunomfundi wesiganeko sesipili sentsimi?Xa udlala le lensi yentsimi yeyona fomati inkulu yepateni, indawo esembindini ayinangxaki, umphetho wenxalenye uya kuziva ngokucacileyo ubuthathaka kakhulu, ukuphawula ubunzulu kuya kuba nzulu kakhulu.Le parameter eninzi abathengisi izixhobo musa ingqalelo, kodwa kwakhona rhoqo iimpazamo, kufuneka balumke.

4) Ugxininiso lwedayimitha yendawo "d":ngefomyula yebala elilula eligxininise “d” = 2fλ / D yazi, okukhona ubude bojoliso “f”, kokukhona ubukhulu bendawo ekugxilwe kuyo “d”;ubude bamaza “λ” ukuba nde, kokukhona indawana egxininisiweyo inkulu “d”;Ubukhulu bedayamitha yendawo yesiganeko D, incinci isithuba sendawo ekugxilwe kuyo “d”.

Kodwa sazi njani ukuba ingakanani indawo isipili sentsimi esijolise kuyo?Kukho iparameter ngaphakathi kwendawo ngokubanzi iparameters yelensi: umda wediffraction spot okanye ebizwa ngokuba yi-diffuse spot okanye ebizwa ngokuba yindawo encinci, eli xabiso lilingana nexabiso elincinci le-lens yentsimi inokugxila, kodwa eli xabiso lixabiso lethiyori. elona xabiso likhulu ngokubanzi kuneli xabiso.

5) Umgama wokusebenza:Abathengi abaninzi bathenga iilensi zentsimi kwaye baqaphele ubude bendawo, kodwa ipharamitha yomgama wokusebenza ayifane iqatshelwe.Kodwa xa kuthengwa i-lens yentsimi yobude obude, le parameter kufuneka ihlawulwe ingqalelo ekhethekileyo, ngaphandle koko kulula ukwenza impazamo.Ngenxa yokuba abathengi abaninzi bekhabhinethi abaphakamisa ukuphakama kohlengahlengiso lwekholamu kulinganiselwe.Ukongezelela, xa siqwalasela ukuphakama kwekholomu, kufuneka kwakhona siqwalasele ukuphakama kwemveliso ngokwayo, ukuphakama kwemveliso ngokwayo ku-200mm ukuphakama, ngoko ukuphakama kwekholomu ehambelanayo kufuneka kufakwe ekuphakameni kwemveliso.

I-6) Kukho indawo ethile egobileyo okanye ukunyuswa okuphezulu kunye nokuphantsi kwemveliso, ukwandisa ububanzi bokuphawula, uye waqonda ubunzulu bokugxila ukuhlangabezana neemfuno.Njengoko sisazi, ukubetha imveliso ngomphezulu othile ogobileyo okanye amahla ndinyuka aphezulu naphantsi, i-lens yasendle kufuneka ibe nobunzulu obuthile bokujolisa, kwaye ukuba ifuna ukuba nobunzulu obude bokujolisa, ngoko ubude bokujolisa obuhambelanayo. kufuneka ibe nde.Ngoko eli xesha lokuqwalasela isibuko sentsimi ayikwazi ukujonga ububanzi kuphela, kodwa kwakhona ukuthatha ubunzulu bogxininiso kwi-akhawunti, ngoko ke kufuneka ukhulise ububanzi, ngoko ubude obugxininisekile buyanda, ubunzulu obuhambelanayo bokugxila buya kwanda.

7) Imisonto yeZipili zeNdawo.Ezinye iibhrendi zinemisonto yesipili sentsimi eyahlukileyo.Ngoko xa uthenga isibuko endle, kufuneka kwakhona ucinge intambo, ukuba ngenene awukwazi ukufumana intambo ehambelanayo yesipili endle, ungafumana isibuko endle ukwenza laser wophawu ikhabhathi kumatshini ukwenza umsonto ukuguqula umsonto.

I-8) Ezinye zeeparamitha eziseleyo nazo zinokubaluleka ukuba ziqaphele: ixabiso le-M1 kunye ne-M2 (umgama we-galvanometer lens ukusuka kwi-lens yentsimi), i-angle yokuskena θ, ubukhulu be-lens, i-retroreflective point (oku kubalulekile kwiinkqubo zamandla aphezulu) , kodwa ezi parameters ziyinkxalabo encinci, kwaye abathengi abakhethekileyo banokucela ezi.